Why is a text not rendering with glow effect but other objects are?
I've solved this. Glow/glare is determined by a background (it bleeds out past the object). Text and shapes have no background like a transparent image plane would.

Solution: Add a plane behind your thing that won't glow, and make sure to add it to the object/mesh. Make this plan transparent, and it won't render but it WILL provide the background needed to show the glow. It's a coding thing that shouldn't exists.